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  2. Thermal radiation - Wikipedia

    en.wikipedia.org/wiki/Thermal_radiation

    This visible glow is called incandescence. Thermal radiation is one of the fundamental mechanisms of heat transfer , along with conduction and convection . The primary method by which the Sun transfers heat to the Earth is thermal radiation.

  3. File:Example incandescence colors (temperature range 550 ...

    en.wikipedia.org/wiki/File:Example_incandescence...

    English: Hot colors - the visible color of objects heated to incandescence. The spectrum of the thermal radiation depends on the temperature, so by observing the color of an incandescent object it is possible to determine its approximate temperature quickly and easily without high precision equipment.

  4. List of light sources - Wikipedia

    en.wikipedia.org/wiki/List_of_light_sources

    This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...

  5. Incandescent light bulb - Wikipedia

    en.wikipedia.org/wiki/Incandescent_light_bulb

    For example, a 100-watt, 120-volt lamp has a resistance of 144 ohms when lit, but the cold resistance is much lower (about 9.5 ohms). [76] [b] Since incandescent lamps are resistive loads, simple phase-control TRIAC dimmers can be used to control brightness. Electrical contacts may carry a "T" rating symbol indicating that they are designed to ...

  6. Pyrognomic - Wikipedia

    en.wikipedia.org/wiki/Pyrognomic

    Pyrognomic materials are said to become visibly incandescent at relatively low temperatures.In practice, virtually all solid or liquid substances start to visibly incandesce around 798 K (525 °C; 977 °F), with a mildly dull red color, whether or not a chemical reaction takes place that produces light as a result of an exothermic process.

  7. Luminescence - Wikipedia

    en.wikipedia.org/wiki/Luminescence

    Luminol and haemoglobin, an example of chemiluminescence UV-photoluminescence in microbiological diagnostics. Luminescence is a spontaneous emission of radiation from an electronically or vibrationally excited species not in thermal equilibrium with its environment.

  8. These Homeowners Didn't Know They Had an Ant Problem ... - AOL

    www.aol.com/lifestyle/homeowners-didnt-know-had...

    A weekend getaway became a nightmare for one couple when biting ants fell from the ceiling onto them as they slept. Here's how to keep it from happening to you.

  9. Luminous flame - Wikipedia

    en.wikipedia.org/wiki/Luminous_flame

    In the simplest case, the yellow flame is luminous due to small soot particles in the flame which are heated to incandescence. Producing a deliberately luminous flame requires either a shortage of combustion air (as in a Bunsen burner) or a local excess of fuel (as for a kerosene torch).